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G. RAL! WALL June 1.2,

Filed March 4, 1927 @unaniem attenua Patented June 12, 1928.

UNITED i STATES GUSTAV BAU, F KANSAS CITY` MISSOURI, ASSIGNOR TO RAU CONSTRUCTION COM- PATENT OFFICE.

PANY, OF KANSAS CITY, MISSOURI, A CORIORATION OF MISSOURI.

WALL.

Application led March 4, 1927.

This invention relates to walls particularly adapted for use in connection with furnaces and the like.

The essential object of the invention is to provide compensating expansion features as a. part of the wall construction and also incorporated in the walL to avoid cracking or bulging of the wall settingT by permitting expansion and contraction ot the wall to such an extent as to prevent the components oi the wall from separating and the wall ends thus loosened from falling inwardly or outwardly with obvious disadvantages in A further object of the invention is to generally improve outer and intermediate walls of various applications subjected to intense heat, to materially decrease deterioration of such walls and provide for installation of `more durable and economical wall structures for use withfurnaces and boilers and the like.

The improved wall structurer comprises a novel form of expansive jointmeans including blocks alternately formed with tongues and grooves asscmbledto provide joints of greater width than ordinarily used adjacent to the greatest heat area and to utilize in connection therewith an advantageous joint filling, and further to insert a secondary joint expansive controlling means in theportion of the wall which is less aifected by the heat. Y i

The invention further consists of the construction and arrangement of the several parts which will be more fully hereinafter described and claimed.

Tn the drawingz Figure 1 is an inside elevation of a portion of a Wall, partially broken away, and embodying the features of the invention.

Figure 2 is a horizontal section on the line 2 2, Figure 1.

Figure 3 is a transverse vertical section on the line 3. 3. Figure 2. Figure 4 is an enlarged view of tbefsecondary expansive means.

lFigure 5 is an enlarged detail perspective view of two of the preferred block components of the improved wall.

In addition to being particularlyadapted for boiler or furnace walls which are subjected to intensive heat. the improved wall structure is also intended to be used in stills,

furnace or walls subjected to intensive heat.'

detail perspective j Serial No. 172,889.

bake ovens and other similar walls and also utilized in boilers, furnaces,"bake ovens, and other walls that may be set lin battery and where it may be necessary to dispose the improved blocks and secondary expansive means in the dividingV or center walls to permit the latter to expand and contract with the same advantages and economy of Wall installation. Hereafter wall is referred to in the subjoined description. it will be understood that any wall is intended to be indicated bythe specific wall to which referenceis made. and more` over. the expansion and contraction ot the in accordance with the temperature to which the wall is subjected` As shown in the accompanying drawing,

the Wall comprises an inner tire brick lining 5 which 1s located adjacent to and receives when theiword f improved `walls will yhave therein the imthe greatest heat influence, and an outer j `brick wall 6 which may be `considered as the sustaining` wall structure. y The inner or; lining wall` to effectively carry out the features of the invention. has fire brick blocks 7 and `8 interposed therein. each block 7 baving a longitudinally projecting tongue on tenon`9 which is fitted in a mortise or re-` cess 10- of slightly greater width than'the thickness of the tongue or tenon 9. and between thecontiguous faces ot the .blocks 7 and 18 a comparativelywide joint 11. and 12 isformed. and betweenthe endfedge of the tise 1()` the same dimension of joint space is provided` as at 13.. The joint. space 11 extends fully through the inner sideotthe tire brick lining 5. and is preferably lilled with wet asbestos 14. the latter extending to the adjacent sides of the several tongues or tenons 9'. the joint space 12 which is in transverse alinement with the joint space 11 being filled with dry asbestos, as at 15;l and the joint space 13 between the tongue or teuon and the end wall of the recess or mortise 10 being also filled or packed with dry asbestos 1 6. The `blocks 7 and 8 are superposed. in regular order through the vertical inner side oi the wall. and the joint con struction just described likewise continues vertically between the blocks. The joint tongue or tenon 9 and the wall ot the morf space 12 extends outwaidly beyond the outer limitations or sides of the blocks 7-and 8 and continues through the outer portion of the yWall 6, said joint space 12 being only partially filled .with dry asbestos beyond the outer sidesofthe blocks 7 and 8. The asi bestes filling 15 continues outwardly through the outer portion 6 of the wall to a second-` ary expansive joint controlling means 17 comprising two components 18 and19, the

component 18 being in the form of a rectangular sheet metal plate and the component 19 of a 4doubled sheet'metal plate to movably receivea portion of the plate 18.

This secondary expansive means extends across the joint space continuing outwardly from the rear sides Vof the blocks 7 and 8, and is embedded in the outerside or portion 6 of the wall.` The joint space from this secondary @expansive means to the outer fa'ce i of the outer side or portion 6 of the wall is free of lling andthereover will be applied the usual buckstay means 20. Each plate 18 has metal anchor strips 21 projecting from ythe end thereof and similarly each plate 19 has the doubled metal intermediately cutaway toprovide upper and lower anchor strips 22. The metal; anchor strips 21 are suitablylfastened to each plate 18,`and the "doubled or bent receptive plate 19 beyond the'seat or slot 23 formed therein to receive the companion` plate 18, is tightlyvsecured by rivets or other similar fastenings Q4, as clearly `shown byFigure 4. This secondary 'metal expansive means serves to prevent the sive'imetal point meansjis built into vthe brick 'workandfis held in place so that the comv{ponentvzl'S will have movement'relatively to f the component 19 without liability of being 1 obstructed inthe expansive and contractive function thereof in accordance with the expansionror contraction ofthe wall in which said metal joint means is mounted.

i `Tet Vasbestos filling 14 is used in the inner joint space l1 to .prevent the same from falling out of place, after heat is applied in the furnace orzotheiwall'andiniuences the wall, the latter will expand and cause this joint to entirely close and thus hold the wet Furthermore, asbestos is used las a lil-ling in theseveral parts of the 1open joints 11, 16 and 12 to prevent dirt from falling into the joint and also to obstruct the passage of `flame through the crevice thus formed and which is further obstructed by the tongue and mortise jointure of the .blocks 7 and 8. The provision of the tongues or tenons 9 and the mortises or re cesses 10 is to prevent the wall or walls in which said blocks are installed'from moving in any other direction except back and forth as the said wall or walls become heated and cooled. Furthermore, the blocks 7 and 8 may vary in length in certain wall constructions, and the difference in dimensions between eachY tongue or tenon and the mortises or rei-ess 1() is to allow for expansion and contraction as heretofore indicated and also to prevent racturing of the tenons which would be tliecase if restricted and stick in the inortises or recesses therefor. In many constructions the metal expansive joint will not be required-in the dividing or center walls, the blocks with theV tongues or tenons and the inortises or recesses being all that is necessary in use to compensate for the expansion and contraction of the joints in these particular walls. However, where the metal expansive joint means is installed, the plate 18 will` be free to slide outwardly from and into the seat 23 of the receptive .plate 19. A x

The improved ljoint blocks forming the primary expansive means and metal expansive mea-ns will be ordinarily continued upwardly through the entire wall, as indicated by dotted lines in Figure 1, and these sev,- eral joint components always will be maintained in position for effectively functioning in the walls in which they are located. In addition, the secondary metal expansive jointmeans will also serve as a binding element relatively to the wall in which `it is installed, and the ytwo expanding joint structuresV including ,the blocks 7 yand -8 and the expansive joint metal means will have a close cooperation in rendering the operation of the vwall or'walls effective in their expansion and contraction.

.What is claimed as new is 1. A wall of the class specified, consisting of an outer sustaining walland an inner `refractory wall having blocks with movable interitting tongues and recesses, an open space extending transversely throughl both portions of the walls and also between. the

ends of the tongues and the end walls of the recesses therefor, metal expansive means disposed in the outer sustaining wall and comy prising an Velement extending and telescopically fitted in relation to a remaining doubled element, the metallic expansive .means forming intermediate closing means, an openjoint space extending transversely through both portions of the walls and -between the ends iio j' of the tong-ues andy the end walls of therecesses for the tongues, and a filling consist-4 ing of primary wet ,asbestos in the inner..

portion of the joint space up to the tongues of tlieblocks and dry asbestos inthe joint space between. the ends ofthe tongues and end walls of the recesses for the latter and also between the outer sides of the tongues and to the secondary metallic expansive joint means.

2. A wall .of the class specified, consisting ofvan outer Sustaining wall and an inner 1e ractory lining wall .including a series of blocks provided with interftting separating means, an open joint space extendingtransversely through both portions 'of the wall and also between the ends of the interfitting separating means of the blocks, a seconda-ry metallic expansive joint means embeddedin the outer wall and consisting of a single plate having anchoring means movably associated with a doubled plate provided with a seat recess therefor and also having anchoring means, the secondary expansive oint means extending across the open joint space intermediately of the outer wall and providing an outer closure for a portion of the outer vjoint space, and a filling of primary wet asbestos in the inner portion of the joint space and dry asbestos between the ends of the interfitting means of the blocks and betwen the outer portion of the said bloc-ks and the secondary expansive joint means.

3. A wall of the class specified, comprising anvouter sustaining wall structure and an inner lining wall of a refractory character comprising blocks respectively provided with movable intel-fitting tongues and recesses, joint sp'aces being transversely formed through the wall and also between the ends of the tongues and end walls of the recesses and also between the sido walls of the tongues and the adjacent similar walls of the recesses, and a filling of primary wet asbestos in the inner portion of the joint space up to the said tongues, and the joint spaces between the ends of the tongues and the end walls of the recesses and the side walls of the tongues and side Walls of the recesses and the remaining portions of the joint spaces having a filling of dry asbestos.

In testimony whereof I have hereunto set my hand.

GUSTAV RAU. 

